Na0.67Mn1-xMgxO2 (0 ≤ x ≤ 0.2): a high capacity cathode for sodium-ion batteries

被引：421

作者：

Billaud, Juliette ^{[1
]}

Singh, Gurpreet ^{[2
]}

Armstrong, A. Robert ^{[1
]}

Gonzalo, Elena ^{[2
]}

Roddatis, Vladimir ^{[2
]}

Armand, Michel ^{[2
]}

Rojob, Teofilo ^{[2
]}

Bruce, Peter G. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland

[2] CIC ENERGIGUNE, Minano 01510, Spain

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2014年 / 7卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

ENERGY-STORAGE; ELECTROCHEMICAL INTERCALATION; DEINTERCALATION; ELECTROLYTE; CHALLENGES; BRONZES; PHASES;

D O I：

10.1039/c4ee00465e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Earth-abundant Na-0.67[Mn1-xMgx] O-2 (0 <= x <= 0.2) cathode materials with the P2 structure have been synthesized as positive electrodes for sodium-ion batteries. Na0.67MnO2 exhibits a capacity of 175 mA h g(-1) with good capacity retention. A Mg content of 5% is sufficient to smooth the charge/ discharge profiles without affecting the capacity, whilst further increasing the Mg content improves the cycling stability, but at the expense of a lower discharge capacity (150 mA h g(-1) for Na0.67Mn0.8Mg0.2O2). It was observed that the cooling process during synthesis, as well as Mg content, have an influence on the structure.

引用

页码：1387 / 1391

页数：5

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